A tacker is a device to operate a cruising chute over a furled sail with a roller furling unit. Coxjam asked how to rig a cruising chute. So, I'll tell him saving the sock for last. You need a tack line that is a line attached to the tack of the sail (the lower corner at the leading edge). Then you need a halyard to attach to the head (the upper corner). Then you need two sheets (control lines to trim your sail - port and starboard). The tack line should go from the tack of the sail, down through a block (pulley) near the stem head (where the forestay attaches) and it should lead back to the cockpit where you can adjust it easily and conveniently. There should be a snap of some sort where the tack also attaches to the forestay and rides up and down when you ease or tighten the tack line. If you have roller furling, then you need to use an ATN Tacker that fits around the furled sail so you have the up and down adjustability. The halyard usually is above where the forestay attaches. I believe you have a fractional rig, so either there already is a halyard coming out of an exit box above the forestay, or you have to install one. You can use a genoa halyard too. The difference is when you gybe, the sail either comes around in front of the forestay or inside the fore triangle. The sheets attach the same way they do on a genoa, but, if you are using a halyard above the forestay, then they must be lead around the front of the forestay.
One advantage of a cruising chute over a kite with a pole is that you can sail closer to the wind. When doing this, you need to straighten the luff (leading edge) and you do this by pulling in the tack line and the halyard. As you fall off the wind, you ease off of the tack line and let the leading edge (luff) bow out or get fuller. You trim with the leeward sheet so that the leading edge of the sail is on the verge of luffing. If it starts to luff, sheet it in so that you just loose the luff and always sail it on the edge.
Now, you have a scoop or sock to dowse the kite. They usually have their own control lines to raise and lower the loop in the bottom of the sock to either dowse the spinnaker when lowering, or deploy the spinnaker when raising it. When the sail is deployed, the sock is gathered above the head, therefore the top of the sock has to be secured up by the halyard exit point (halyard shackle). When the sock has folded up the sail within, you just release the spinnaker halyard and the whole tube arrangement is collected on deck. When you are going to raise the sail, after your tack line and sheets are attached, of course, you hook the halyard to the head of the sail and raise the tube and then pull the line that raises the bottom of the sock. Happy Sailing.